-9y^2-12y-4=0

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Solution for -9y^2-12y-4=0 equation: 



-9y^2-12y-4=0

a = -9; b = -12; c = -4;
Δ = b2-4ac
Δ = -122-4·(-9)·(-4)
Δ = 0
Delta is equal to zero, so there is only one solution to the equation

                              Stosujemy wzór:
$y=\frac{-b}{2a}=\frac{12}{-18}=-2/3$

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